Premium
Flexible Piezoelectric Chitosan and Barium Titanate Biocomposite Films for Sensor Applications
Author(s) -
Guzmán Sierra Dayana L.,
Bdikin Igor,
Tkach Alexander,
Vilarinho Paula M.,
Nunes Cláudia,
Ferreira Paula
Publication year - 2021
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.202000938
Subject(s) - biocomposite , chitosan , barium titanate , piezoelectricity , dielectric , nanotechnology , materials science , hydrothermal circulation , composite material , nanofiber , polymer , chemical engineering , composite number , optoelectronics , engineering
There is currently a demand for flexible biomedical sensors. Characteristics as soft, thin, elastic, flexible and comfortable to the contact with skin should be matched with performance and ultimately made of sustainable, and biocompatible materials. In this work, chitosan as a flexible biodegradable polymeric matrix was combined with ferroelectric BaTiO 3 particles obtained by hydrothermal synthesis to prepare flexible films. The biocomposites have high flexibility and the addition of particles improves the elasticity of pristine chitosan films. Of relevance towards the targeted application, the biocomposites exhibit a better resistance to water than chitosan. The dielectric permittivity increases with the addition of BaTiO 3 particles. The observation of d 33 and d 15 by PFM, confirms the presence of piezoelectric domains corresponding to the location of BaTiO 3 particles. These results contribute to the understanding of the role of functional oxides on the chemical and physical behavior of biobased polymers, creating opportunities to design optimized and more sustainable flexible piezoelectric sensor films.